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Test your basic knowledge |
Dairy Cattle And Reproduction
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Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
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study here
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Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Size of cow in relation to the amount of milk produced
scrotum
growth lost from castration methods (knife & band)
vulva
2. What makes the milk flow through the mammary glands?
rectal palpation (BSE)
dry matter and water
Blood
mare gestation
3. 16-20 hours
sperm cell
scrotal circumference (BSE)
testis (gonads)
cow estrus
4. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
dry-off time in dairy cattle
Follical Stimulating in females
functions of progestrone
elastrator
5. (FSH) causes egg to mature in females
elastrator
Follical Stimulating in females
mare gestation
Where livelihood is in agriculture
6. Birthing process (termination of gestation)
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
uterus
age and castration
Parturition
7. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
spermatogenesis
ewe estrus
hormones
Bull's fibro-elastic penis
8. 265-285 days
spermatogenesis
Dairy Cattle Gestation
urethra
penis sizes vs delivering methods
9. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)
prostate gland
scrotal circumference (BSE)
castration
mare ovulation
10. Contains and regulates the temp of the testes for sperm production
dry-off time in dairy cattle
scrotum
mare's estrous cycle
retractor muscles
11. Days which have increasing daylight hours
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12. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
Jersey Cow
organs used in spermatogenesis
Grading choice
Brown Swiss Cow
13. FEED
why does the cow need fat deposits during pregnancy?
Parturition
#1 cost in production
scrotal circumference (BSE)
14. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
van deferens
Brown Swiss Cow
feeding a high producing dairy cow
Where livelihood is in agriculture
15. Parturition is controlled by...
cow gestation
Hormones from both the fetus and the mom.
reasons for castration
pelvis
16. Important 'landmark' during palpation
epididymis: definition - 3 parts - 4 functions
ewe's estrous cycle
cervix
mare's estrous cycle
17. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
why does the cow need fat deposits during pregnancy?
testis (gonads)
Avg. bull specs
pelvis
18. 19-23 (21) days
sow estrus cycle
mare estrus
Hard
functions of progestrone
19. (male) pushes the testes outward toward the legs for a cool-down off of the body
6-8 weeks
cremaster muscle
sow estrus
Sperm survival specs
20. 26 hours after estrus begins
ewe ovulation
Parturition
Size of cow in relation to the amount of milk produced
reasons for castration
21. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
epididymis: definition - 3 parts - 4 functions
Lutinizing Hormone in females
Hard
mare's estrous cycle
22. 19-23 (21) days
feeding a high producing dairy cow
sow gestation
spermatogenesis
cow estrus cycle
23. Sperm production
Sperm survival specs
spermatogenesis
age and castration
penis sizes vs delivering methods
24. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation
Holstein Cow
things to check for in a breeding soundness exam (BSE)
functions of progestrone
cervix
25. Days which have increasing daylight hours
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26. What helps regulate spermatogenesis?
accessory sex glands
~1 month
testosterone
growth lost from castration methods (knife & band)
27. Actual heat cycle (period)
effects of BST
estrus
cow gestation
butterfat
28. Important 'landmark' during palpation
cow gestation
Sperm growth rate
hypothalamus and pituitary gland
cervix
29. (male) pushes the testes upward toward the body for warmth or protection
cow estrus cycle
Grading choice
dartos muscle
scrotum
30. Allows extension of penis without fibro-elastic penis
effects of BST
Dairy Cattle Gestation
sigmoid flexure
oviducts
31. ~305 days (altough often longer due to breeding difficulties)
Dairy Cattle Lactation (standard)
libido test (BSE)
Avg. bull specs
mare gestation
32. 1. brain function - 2. blood flow - 3. willing female
reason for seasonal breeding periods
estrus
what has to happen for males for copulation to occur
van deferens
33. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
oviducts
dry-off time in dairy cattle
Dairy Cattle milking schedule
age and castration
34. Can survive ~7 days in cow. vast majority <48 hours
sow estrus
Sperm survival specs
Holstein Cow
sperm cell
35. Look for infection - split - and rupture of the penis
cervix
Sperm survival specs
penis and prepuce observation (BSE)
cowper's gland
36. Larger the cow - more milk is produced; smaller the cow - less milk is produced
Brown Swiss Cow
seasonally polyestrous
functions of progestrone
Size of cow in relation to the amount of milk produced
37. Prevent the cow from getting an infection from the calve
dartos muscle
libido test (BSE)
Dairy calves are removed from cow at birth to...
ewe gestation
38. Not under a timeline - cow can not be sold as steak
Grading choice
growth lost from castration methods (knife & band)
Size of cow in relation to the amount of milk produced
urethra
39. FEED
#1 cost in production
cryptorchid
Lutinizing Hormone in females
ewe estrus cycle
40. Allows extension of penis without fibro-elastic penis
6-8 weeks
sigmoid flexure
accessory sex glands
Blood
41. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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42. 26 hours after estrus begins
#1 cost in production
sow ovulation
Sperm growth rate
ewe ovulation
43. Milk ~305 days - dry 60 days prior to calving
stag
Dairy Cattle milking schedule
4 major reasons for culling dairy cows
1. more cost effective - 2. powdered milk is in excess production
44. 336 days
dartos muscle
mare gestation
mare ovulation
Dairy Cattle Lactation (standard)
45. 1. brain function - 2. blood flow - 3. willing female
what has to happen for males for copulation to occur
libido test (BSE)
sow estrus cycle
scrotal circumference (BSE)
46. Microscopic - make sure not sterile - very few bulls are actually tested
cryptorchid
Grading choice
semen evaluation (BSE)
behavioral signs of estrus
47. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING
reason for seasonal breeding periods
Where livelihood is in agriculture
urethra
pelvis
48. Contains and regulates the temp of the testes for sperm production
epididymis: definition - 3 parts - 4 functions
Dairy Cattle Gestation
scrotum
functions of progestrone
49. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders
mare's estrous cycle
ewe gestation
Mares
Follical Stimulating in males
50. 1-2 days
ewe estrus
pelvis
dry matter and water
oviducts
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